How to fire event from button inside datagrid in silverlight and MVVM

Question

I have button at first column in datagrid. I am using MVVM and try to bind Command to Command in ViewModel but when I click button in each row, it don't work (It don't call Command in ViewModel) but if I move that button out of datagrid it's working properly.

How can I fire event from button inside datagrid in MVVM?

Update 1:

XAML's code is:

<datagrid:DataGridTemplateColumn.CellTemplate>
    <DataTemplate>
        <StackPanel Orientation="Horizontal" 
                        VerticalAlignment="Center">
            <Button x:Name="button" Content="View" Margin="5" DataContext="{StaticResource XDataContext}">
                <i:Interaction.Triggers>
                    <i:EventTrigger EventName="Click">
                        <i:InvokeCommandAction Command="{Binding ViewOrganizationCommand}"
                                                CommandParameter="{Binding ElementName=dtgOrganizations, Path=SelectedItem}" />
                    </i:EventTrigger>
                </i:Interaction.Triggers>
            </Button>
        </StackPanel>
    </DataTemplate>
</datagrid:DataGridTemplateColumn.CellTemplate>

ViewModel's code is:

public ViewModelCommand ViewOrganizationCommand { get; set; }

Answer 1

Instead of using EventTrigger, why not simply bind to Button.Command directly, like so?

<Button 
    ...other properties...
    Command="{Binding ViewOrganizationsCommand}"
    CommandParameter="{Binding}"/>

That will bind the command, and set the CommandParameter to the DataContext of the Button, which presumably is a good thing to bind the parameter to. If it's not, just bind CommandParameter to something else that helps you uniquely identify the specific row being clicked on.